Korra.

"It's got a bit of dirt on it," Korra remarked, starting to brush the dirt off the lamp. Without warning, glittering blue mist erupted from the spout, and enveloped Korra.

"What the hell!?" she exclaimed, trying to get out of it, but found that she couldn't move much. Freaking out, she tried he attempted to use her Air Bending to blow the mist away, but nothing happened. She then freaked out as her Water Tribe Outfit disintegrated, becoming one with the mist.

"Korra!" Asami shouted, trying to run into the mist to grab her, but she only got half a foot in before she was pushed out, albeit not roughly.

Left naked, Korra renewed her struggles, but made no headway. Then, her body felt overcome with some sort of pleasant sensation. A tingling as the mist seemed to be absorbing into her body. All of her hair that grew below the neck fell out, and she felt her breasts grow more sensitive, and slightly in size. She moaned, it felt good, but she still was afraid of what was happening. The mist then started forming new clothing around her. She blushed heavily as what seemed to be a translucent blue Middle Eastern harem outfit materialized on her body, fitting snugly, and made of some luxurious silk. Despite the embarrassment she felt at the get up, she couldn't deny it was amazingly comfortable.

Asami, realizing she couldn't do much to help, began to try running back to the Air Temple to get Tenzin, or any of the other Airbenders. A tendril of mist however wrapped her ankle and tripped her up, another covering her mouth to keep her from drawing unwanted attention. She didn't realize it yet, but the lamp was doing her a solid in that regard. Once they had all the facts, they'd prefer to keep what had happened on the down low after all.

The mist started to recede, though maintaining a grip on Asami for the time being as the tingling sensation intensified in Korra's feet and legs, and she looked down and shrieked as she saw her toes were dissolving into the mist, which remained connected to the spout of the lamp. She began thrashing to try to pull away, but she was firmly connected to the mist as the effect traveled up her feet, then her legs. It finally ended as her thighs and hips were consumed, leaving her floating off the ground, her lower half now a tail made of the mist. The tip of said tail was attached to the spout of the lamp. She found she could move it, the motions coming naturally, like it had always been a part of her body. She tried to pull it away from the lamp, but it wouldn't detach. Nor would the lamp budge as she attempted to pull it. "Damn it, what the hell!?" Korra growled.

Asami got up as the mist released her, and she could see what happened to Korra. "Korra... You okay?"

"Do I LOOK it!?" Korra demanded. "I'm stuck to this stupid thing, and I look like some kind of slut!" She then felt another surge of alarm as she felt an inexorable pull on the tail, drawing her into the lamp. "No, no, Asami, help!" she cried out, trying to move away, but her efforts failed to even slow herself being drawn in. Asami immediately rushed forward, grabbing Korra's hand, yanking with all her might, but instead of pulling her away from the lamp, it just seemed to yank the lamp, which absorbed Korra in one go, and ended up in a stunned Asami's hands.